import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
Vue.use(VueRouter)

const routes = [
  { path: '/', redirect: '/login' },
  { path: '/login', component: Login },
  { path: '/Home', component: Home }
]

const router = new VueRouter({
  routes
})

// 挂载路由导航守卫
router.beforeEach((to, from, next) => {
  //to 将要访问的路径
  //from 代表从哪个路径跳转而来
  //next 是一个函数，表示放行
  //next() 放行， next('/login) 强制跳转
  if (to.path === '/login') {
    return next();
  }
  const tokenStr = window.sessionStorage.getItem('token');
  if (!tokenStr) {
    return next('/login');
  } else {
    next();
  }
});

export default router
